نتایج جستجو برای: other heavy metals

تعداد نتایج: 1899163  

ژورنال: بلورشناسی و کانی شناسی ایران 2017
مظهری, سید علی,

Surface soils of Sabzevar zone could be geochemically divided into two groups of serpentine (Se) and non-serpentine (Nse) soils. Serpentine soils have higher MgO, FeOt, CaO, S, Ag, Co, Cr, Cu and Ni and lower SiO2, Al2O3, Na2O, K2O, Be, Li, Sc, Ti, U and V than Nse. In other word, Nse samples have high REE content with fractionated LREE/HREE trends in REE diagrams (ΣREE= 31.89- 58.3 ppm; LaN/Yb...

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Journal: Pollution 2018
Alper Yanar, Ayşe Yilmaz, Ela Alkan,

Heavy metals that enter marine environment and remain in the water as well as the sediments are accumulated by aquatic organisms, thus becoming highly good indicators to monitor metal accumulation in the long run. Metals are potentially harmful to humans and most organisms at varied levels of exposure and absorption. Northern East Mediterranean Sea is a crucial region as it is an area, shared b...

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ژورنال: پژوهش های ماهی شناسی کاربردی 2021
Ahmadnezhad, Mohaddeseh, Ghorbani Hasansaraei, Azade, Golestan, Leila, Khara, Hossein, Sadrinezhad, Ali,

The present study was performed to measure heavy metals (Pb, Zn, Cd and Cu) in the muscle, liver, gonad, intestine and digestive parasites of Pike (Esox lucius) in Anzali wetland. For this purpose, 90 fish Pike were sampled from Anzali wetland during 2020 and in the reproductive season (winter). During the experiment, total length, fork length, standard length and total weight were measured. Th...

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Journal: :تحقیقات نظام سلامت 0
حمیدرضا تشیعی دکتری مهندسی بهداشت محیط، شرکت مهندسی آب و فاضلاب کشور، تهران، ایران. مهدی حاجیان نژاد دانشیار، مرکز تحقیقات محیط زیست، دانشگاه علوم پزشکی اصفهان، اصفهان، ایران محمدمهدی امین دانشیار، مرکز تحقیقات محیط زیست، دانشگاه علوم پزشکی اصفهان، اصفهان، ایران. فرهام کرکانی کارشناس ارشد مهندسی بهداشت محیط، عضو بنیاد ملی نخبگان، تهران، ایران.

background: various chemicals are used to produce polymers ,leakage of polymer materials over the time , can cause health problems the aim of this research was to evaluate the leakage of heavy metals from the pvc and polypropylene pipes used in the water distribution system in isfahan. methods: four brands of pp pipes and two various types of pvc pipes were analyzed in this study. concentration...

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Journal: Caspian Journal of Enviromental Sciences 2005
E. Islam G. Jilani M. J. Hassan P. Zheng, Q. Mahmood R.C. Jin Y. Hayat

Textile wastewater contains substantial pollution loads in terms of Chemical Oxygen Demand (COD), Biological Oxygen Demand (BOD), Total Suspended Solids (TSS), Total Dissolved Solids (TDS) and heavy metals. Phytoremediation used for removing heavy metals and other pollutants by aquatic macrophytes treatment systems (AMATS) is well established environmental protective technique. A lab scale stud...

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ژورنال: سلامت و محیط زیست 2017
حمیدیان, امیرحسین, خراسانی, نعمت اله, سیستانی, ندا, عظیمی یانچشمه, رخساره, علی طالشی, محمدصالح, معین الدینی, مظاهر,

Background and Objective: Urban and industrial development has increased concentration of heavy metals in the environment. The goal of this study was to assess the impact of Kerman steel complex on their surrounding soil by heavy metals. Materials and Methods: This study was a snapshot and its type was descriptive-analytical research. Heavy metals contents from 60 soil samples (top soil, 0-1...

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Journal: :The Science of the total environment 2003
V Shevchenko A Lisitzin A Vinogradova R Stein

A review of the data on heavy metals in aerosols over the seas of the Russian Arctic is presented. Results of heavy metal studies in aerosols obtained during 11 research expeditions in summer/autumn period from 1991 to 2000, and at Severnaya Zemlya and Wrangel Island in spring, in 1985-1989 are discussed. Concentrations of most heavy metals in the atmosphere in the marine boundary layer in the ...

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ژورنال: زیست شناسی دریا 2020
, ,

Coastal areas including the estuaries of Persian Gulf are sensitive and fragile areas of aquatic ecosystems in Iran that are severely affected by pollution from urbanization, industrialization, and maritime activity. Despite numerous studies on the status of pollution, especially heavy metals in these areas, comprehensive and systematic studies on this subject have not been conducted. Therefore...

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Journal: Journal of the Persian Gulf Marine Sciences 2016
Mahmood Sinaei,

In this study, heavy metals (Hg,Cd,Pb,Cu,Zn) and metallothionein (MT) biosynthesis were measured in blood of green sea turtles (Chelonia mydas) nesting on the northern coast of the Sea of Oman. Heavy metals concentrations in the sea water, the sediments, the blood samples ranged between 0.02-8.43 μg/l, 0.06-10.32 μg/l, and 0.16-36.78μg/g (ww), respectively.The highest concentration...

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Journal: Iranian Journal of Chemical Engineering 2008

Airborne particulate matter (PM10 ) was collected from the atmosphere of the city of Isfahan. The concentration of heavy metals and anions associated with airborne particulate matter were determined using atomic absorption spectrometric and ion chromatographic techniques. A comparison was made between the variation in the concentration of PM10 and that for heavy metals and...

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